A mold and medical injection molding system with negative pressure and push-to-discharge coordination

Abstract

The invention relates to the technical field of injection molded parts production, in particular to a mold and a medical injection molded parts injection molding system for coordinated unloading of negative pressure and ejection, comprising a movable mold and a static mold; the movable mold comprises: a mold body, on which a plurality of needle sleeves are arranged, the interior of the needle sleeves is a hollow structure, and a plurality of adsorption holes are equidistantly arranged on the needle sleeves in a circumferential manner; an ejector pin, which penetrates the needle sleeves and is slidably arranged; a negative pressure component, which is connected to the needle sleeves, and the negative pressure component can generate negative pressure in the needle sleeves and adsorb the injection molded parts when the mold body is separated from the static mold; a lifting component, which is arranged in the mold body and connected to the ejector pins, and the lifting component can pull and release the ejector pins, and when the lifting component releases the ejector pins, the ejector pins can protrude from the end of the needle sleeves; a pressure relief structure, which is connected to the negative pressure component and the lifting component, and the pressure relief structure can balance the air pressure in the negative pressure component when the lifting component is in action, thereby improving the stability during unloading.

Description

Technical Field

[0001] The invention relates to the technical field of injection molded parts production, in particular to a negative pressure and top push coordinated unloading mold and a medical injection molded parts injection molding system. Background Art

[0002] Injection molding has the advantages of high efficiency, high precision, material versatility, high degree of automation, and high cost-effectiveness. It is widely used in automobile manufacturing, packaging industry, electronic product manufacturing, medical device production and other fields.

[0003] During the injection molding process, when the injection molded parts are completed and cooled, they need to be removed to form a closed loop of the injection molding process. In the traditional process, when the molds are separated, in order to ensure that the injection molded parts are concentrated on one of the molds for easy unloading, the mold is generally provided with an adsorption device to adsorb the injection molded parts through negative pressure. At the same time, after the two molds are separated, the injection molded parts need to be removed by a robot. At this time, the adsorption device needs to stop working immediately, so the unloading and adsorption actions need to be completely staggered.

[0004] In the existing system, the unloading action and the adsorption action are controlled by the control system. In theory, there will be no time difference. However, the action mechanism attached to the control system may have action delays due to wear, voltage and many other reasons, resulting in the possibility that the unloading action and the adsorption action may be carried out simultaneously, affecting the stability of unloading. Summary of the invention

[0005] The object of the present invention is to provide a mold and a medical injection molding system for unloading by coordinating negative pressure and top pushing, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A negative pressure and top push cooperative unloading mold, comprising a movable mold and a static mold, wherein the movable mold comprises:

[0008] A mold body, wherein a plurality of needle sleeves are arranged on the mold body, the interior of the needle sleeves is a hollow structure, and a plurality of adsorption holes are arranged on the needle sleeves at equal intervals in a circumference;

[0009] An ejector pin is slidably arranged through the needle sleeve;

[0010] A negative pressure component is connected to the needle sleeve, and the negative pressure component can generate negative pressure in the needle sleeve and adsorb the injection molded part when the mold body is separated from the static mold;

[0011] A lifting assembly is disposed in the mold body and connected to the ejector pin, wherein the lifting assembly can pull and release the ejector pin, and when the lifting assembly releases the ejector pin, the ejector pin can protrude from the end of the needle sleeve;

[0012] The pressure relief structure connects the negative pressure component and the lifting component. The pressure relief structure can balance the air pressure in the negative pressure component when the lifting component is in action.

[0013] As a further solution of the present invention: the negative pressure assembly comprises a sealing cylinder body fixedly installed in the mold body, one end of the sealing cylinder body is connected to an intermediate connecting pipe parallel to the sealing cylinder body, and the intermediate connecting pipe is connected to the needle sleeve through multiple groups of connecting pipes respectively;

[0014] The sealed cylinder is also provided with an elastic pumping structure, and when the elastic pumping structure is actuated, the air pressure in the sealed cylinder can be changed;

[0015] The negative pressure assembly further comprises an abutment kit connected to the elastic pumping structure, wherein the abutment kit is used to drive the elastic pumping structure to move.

[0016] As a further solution of the present invention: the elastic pumping structure comprises a first sealing plug sealingly and slidably mounted in the sealing cylinder, the first sealing plug is connected to a telescopic shaft coaxial therewith, and one end of the telescopic shaft away from the first sealing plug passes through the sealing cylinder;

[0017] The telescopic shaft is also sleeved with a first cylindrical spring, one end of the first cylindrical spring is connected to the inner wall of the sealing cylinder body, and the other end is connected to the first sealing plug;

[0018] A connecting plate is also provided at one end of the telescopic shaft away from the first sealing plug, and the connecting plate is connected to the abutment kit.

[0019] As a further solution of the present invention: the abutment kit includes a connecting shaft rotatably connected to an end of the connecting plate away from the telescopic shaft, the connecting shaft passes through the mold body and can slide along the length direction of the mold body;

[0020] The abutment kit further comprises a guide sleeve detachably mounted on the side of the mold body, a trigger plate is slidably mounted in the guide sleeve, an abutment portion is disposed at one end of the trigger plate, and an inclined groove body is disposed on the trigger plate;

[0021] The connecting shaft can roll in the inclined groove body.

[0022] As a further solution of the present invention: the lifting assembly comprises:

[0023] A connecting plate, disposed in the mold body and connected to the ejector pin, the connecting plate being connected to the mold body via an elastic telescopic rod;

[0024] an abutment wheel, rotatably connected to the connecting plate;

[0025] A driving assembly is installed in the mold body. The driving assembly cooperates with the abutment wheel to enable the connecting plate to move away from the needle sleeve, and when the connecting plate moves to a predetermined position, the connecting plate moves in the opposite direction and drives the ejector pin to protrude from the end of the needle sleeve.

[0026] As a further solution of the present invention: the elastic telescopic rod comprises a connecting sleeve connected to the mold body and a telescopic rod connected to the connecting plate, and the telescopic rod is slidably fitted with the connecting sleeve;

[0027] A second cylindrical spring is arranged in the connecting sleeve, one end of the second cylindrical spring is connected to the inner wall of the connecting sleeve, and the other end is connected to the telescopic rod.

[0028] As a further solution of the present invention: the driving assembly comprises a double-headed cylinder fixedly mounted on the mold body, two action ends of the double-headed cylinder are mounted with a traverse member, and the traverse member is slidably connected with a guide member arranged in the mold body;

[0029] The end of the transverse moving member facing the abutment wheel is provided with a first inclined surface, a first horizontal surface, a second inclined surface and a second horizontal surface in sequence, and when the abutment wheel is on the first horizontal surface, the connecting plate can make the end of the ejector pin flush with the end of the needle sleeve;

[0030] The drive assembly also includes a switching kit disposed on a side of the transverse member.

[0031] As a further solution of the present invention: the switching kit includes a first slot body and a second slot body arranged on the side of the transverse member, and the first slot body is perpendicular to the second slot body;

[0032] A guide is rotatably mounted on one end of the first slot body away from the second slot body, and a torsion spring is arranged on the rotating shaft of the guide member.

[0033] As a further solution of the present invention: the pressure relief structure includes a pressure relief sleeve connected to the intermediate connecting pipe, the pressure relief sleeve is provided with a pressure relief port, and the axial direction of the pressure relief port is perpendicular to the axial direction of the pressure relief sleeve;

[0034] A second sealing plug is sealingly and slidably installed in the pressure relief sleeve, and a connecting rod penetrating the pressure relief sleeve is installed on the second sealing plug. The connecting rod is detachably connected to the connecting plate.

[0035] A medical injection molding system comprises the above-mentioned negative pressure and top-pushing cooperative unloading mold.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] By setting the negative pressure component, when the mold body is separated from the static mold, the pressure in the closed chamber formed by the sealing cylinder, the middle connecting tube and the needle sleeve is reduced, and the end of the injection molded part is sucked by the adsorption hole, so as to improve the tightness of the connection between the injection molded part and the needle sleeve when the mold body is separated from the static mold, and prevent part of the injection molded part from staying on the static mold, resulting in incomplete unloading during unloading, and affecting the subsequent injection molding, so as to ensure the unloading efficiency and enable the injection molding operation to be carried out continuously;

[0038] By means of the provided lifting assembly, the ejector pin can be driven to retract into the needle sleeve during the movement of the transverse moving member, and at the same time, the ejector pin is driven to accelerate and protrude from the needle sleeve under the cooperation of the abutment wheel and the first groove body, so that the ejector pin can collide with the injection molded part, so as to eject the injection molded part for the unloading robot to grab, and the abutment wheel cooperates with the guide member to realize the reset of the abutment wheel, so that when the transverse moving member reciprocates, the action of ejecting the injection molded part can be repeated, so that the unloading can be carried out continuously, and the continuous injection molding operation is ensured;

[0039] By setting up the pressure relief structure, the pressure of the closed chamber formed by the sealing cylinder, the middle connecting tube and the needle sleeve is relieved before the ejector hits the injection molded part, so as to avoid the injection molded part being in an adsorbed state when the ejector hits the injection molded part, resulting in unloading failure, thereby improving the success rate of unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 The present invention is a structural schematic diagram of an embodiment of a mold for unloading by cooperating negative pressure and top pushing.

[0041] Figure 2 The structural explosion diagram of one embodiment of a mold for unloading by coordinating negative pressure and top pushing.

[0042] Figure 3 The present invention is a schematic diagram of the internal structure of a mold body in an embodiment of a mold for unloading by cooperating negative pressure and top pushing.

[0043] Figure 4 for Figure 3 A magnified view of the structure at center.

[0044] Figure 5 The present invention is a schematic structural diagram of a needle sleeve and an ejector pin in an embodiment of a mold for unloading by cooperating between negative pressure and ejection.

[0045] Figure 6 The present invention is a schematic structural diagram of a negative pressure assembly in an embodiment of a mold for unloading by coordinating negative pressure and pushing.

[0046] Figure 7 The present invention is a structural schematic diagram of a pressure relief structure in an embodiment of a mold for unloading by cooperating between negative pressure and top pushing.

[0047] Figure 8 The present invention is a schematic structural diagram of a lifting assembly in an embodiment of a mold for unloading by cooperating between negative pressure and top pushing.

[0048] Fig. 9 for Figure 8 A magnified view of the structure at point B.

[0049] Fig.10 The present invention is a schematic structural diagram of a transverse moving member and a guide member in an embodiment of a mold for unloading by cooperating negative pressure and pushing.

[0050] In the figure: 1. mold body; 2. needle sleeve; 201. adsorption hole; 3. ejector pin; 4. connecting pipe; 5. sealing cylinder body; 6. first sealing plug; 7. telescopic shaft; 8. first cylindrical spring; 9. connecting plate; 10. connecting shaft; 11. trigger plate; 1101. inclined groove body; 1102. abutment part; 12. guide sleeve; 13. pressure relief sleeve; 1301. pressure relief port; 14. second sealing plug; 15. connecting rod; 16. connecting plate; 17. double-headed cylinder; 18. transverse member; 1801. first groove body; 1802. second groove body; 1803. first inclined surface; 1804. first horizontal surface; 1805. second inclined surface; 1806. second horizontal surface; 19. guide member; 20. guide member; 21. abutment wheel; 22. elastic telescopic rod. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0053] See also Figure 1 to Figure 10In an embodiment of the present invention, a negative pressure and ejection cooperative unloading mold comprises a movable mold and a static mold, wherein the movable mold comprises: a mold body 1, an ejector pin 3, a negative pressure assembly, a lifting assembly and a pressure relief structure, which realizes the pressure relief of the closed chamber formed by the sealing cylinder 5, the intermediate connecting tube and the needle sleeve 2 before the ejector pin 3 hits the injection molded part, so as to avoid the injection molded part being still in an adsorbed state when the ejector pin 3 hits the injection molded part, resulting in unloading failure, thereby improving the unloading success rate, as follows:

[0054] The mold body 1 is provided with multiple sets of needle sleeves 2, the interior of the needle sleeves 2 is a hollow structure, and the needle sleeves 2 are provided with multiple adsorption holes 201 at equal intervals in a circle;

[0055] The ejector pin 3 penetrates through the needle sleeve 2 and is slidably arranged;

[0056] The negative pressure component is connected to the needle sleeve 2, and the negative pressure component can generate negative pressure in the needle sleeve 2 and adsorb the injection molded part when the mold body 1 is separated from the static mold;

[0057] The negative pressure assembly comprises a sealing cylinder 5 fixedly installed in the mold body 1, one end of the sealing cylinder 5 is connected to an intermediate connecting pipe parallel to the sealing cylinder 5, and the intermediate connecting pipe is connected to the needle sleeve 2 through multiple groups of connecting pipes 4 respectively;

[0058] The sealing cylinder 5 is also provided with an elastic pumping structure, which can change the air pressure in the sealing cylinder 5 when the elastic pumping structure is in motion. The elastic pumping structure includes a first sealing plug 6 that is sealingly and slidably installed in the sealing cylinder 5. The first sealing plug 6 is connected to a telescopic shaft 7 coaxial therewith, and the end of the telescopic shaft 7 away from the first sealing plug 6 passes through the sealing cylinder 5;

[0059] The telescopic shaft 7 is also sleeved with a first cylindrical spring 8, one end of the first cylindrical spring 8 is connected to the inner wall of the sealing cylinder 5, and the other end is connected to the first sealing plug 6;

[0060] The end of the telescopic shaft 7 away from the first sealing plug 6 is also provided with a connecting plate 9, and the negative pressure assembly also includes an abutment kit connected to the connecting plate 9, and the abutment kit is used to drive the connecting plate 9 to move, and the abutment kit includes a connecting shaft 10 rotatably connected to the end of the connecting plate 9 away from the telescopic shaft 7, and the connecting shaft 10 penetrates the mold body 1 and can slide along the length direction of the mold body 1;

[0061] The abutment kit further comprises a guide sleeve 12 detachably mounted on the side of the mold body 1, a trigger plate 11 is slidably mounted in the guide sleeve 12, an abutment portion 1102 is disposed at one end of the trigger plate 11, and an inclined groove 1101 is disposed on the trigger plate 11;

[0062] The connecting shaft 10 can roll in the inclined groove body 1101 .

[0063] When the mold body 1 moves toward the static mold, the static mold will abut against the abutment portion 1102 and drive the trigger plate 11 to move relative to the guide sleeve 12. At this time, under the cooperation of the connecting shaft 10 and the inclined groove body 1101, the first sealing plug 6 will move away from the first cylindrical spring 8. At this time, the first cylindrical spring 8 can be stretched and the air in the sealing cylinder 5, the middle connecting tube and the needle sleeve 2 is squeezed out. After the mold body 1 and the static mold are attached and the injection molding action is completed and the cooling of the injection molded part is completed, the mold body 1 will move away from the static mold. At this time, the first cylindrical spring 8 will pull the first sealing plug 6 to move in the opposite direction. At this time, since the adsorption hole 201 is blocked by the end of the injection molded part, the pressure in the closed chamber formed by the sealing cylinder body 5, the middle connecting tube and the needle sleeve 2 is reduced, so that the injection molded part can be firmly adsorbed on the needle sleeve 2, thereby preventing the injection molded part from adhering to the static mold and failing to unload when the mold body 1 is separated from the static mold, that is, when unloading, the injection molded parts can be concentrated on the mold body 1, thereby preventing the unloading robot from completely unloading all the injection molded parts.

[0064] Through the above arrangement, when the mold body 1 is separated from the static mold, the pressure in the closed chamber formed by the sealing cylinder 5, the middle connecting tube and the needle sleeve 2 is reduced, and the end of the injection molded part is sucked by the adsorption hole 201, thereby improving the tightness of the connection between the injection molded part and the needle sleeve 2 when the mold body 1 is separated from the static mold, preventing part of the injection molded part from remaining on the static mold, resulting in incomplete unloading during unloading and affecting the subsequent injection molding, thereby ensuring the unloading efficiency and allowing the injection molding operation to be carried out continuously.

[0065] See also Figure 8~Figure 10 The lifting assembly is disposed in the mold body 1 and connected to the ejector pin 3. The lifting assembly can pull and release the ejector pin 3. When the lifting assembly releases the ejector pin 3, the ejector pin 3 can protrude from the end of the needle sleeve 2.

[0066] The lifting assembly includes: a connecting plate 16, an abutting wheel 21 and a driving assembly.

[0067] The connecting plate 16 is arranged in the mold body 1 and connected to the ejector pin 3. The connecting plate 16 is connected to the mold body 1 through an elastic telescopic rod 22. The elastic telescopic rod 22 includes a connecting sleeve connected to the mold body 1 and a telescopic rod connected to the connecting plate 16. The telescopic rod is slidably fitted with the connecting sleeve. A second cylindrical spring is arranged in the connecting sleeve. One end of the second cylindrical spring is connected to the inner wall of the connecting sleeve, and the other end is connected to the telescopic rod.

[0068] The abutment wheel 21 is rotatably connected to the connecting plate 16;

[0069] The driving assembly is installed in the mold body 1, and the driving assembly cooperates with the abutment wheel 21 to enable the connecting plate 16 to move away from the needle sleeve 2, and when the connecting plate 16 moves to a predetermined position, the connecting plate 16 moves in the reverse direction and drives the ejector pin 3 to protrude from the end of the needle sleeve 2;

[0070] The driving assembly includes a double-headed cylinder 17 fixedly mounted on the mold body 1, and a traverse member 18 is mounted on the two action ends of the double-headed cylinder 17, and the traverse member 18 is slidably connected with a guide member 20 disposed in the mold body 1;

[0071] The end of the transverse moving member 18 facing the abutment wheel 21 is provided with a first inclined surface 1803, a first horizontal surface 1804, a second inclined surface 1805 and a second horizontal surface 1806 in sequence. When the abutment wheel 21 is on the first horizontal surface 1804, the connecting plate 16 can make the end of the ejector pin 3 flush with the end of the needle sleeve 2.

[0072] The driving assembly further includes a switching kit disposed on the side of the transverse member 18, wherein the switching kit includes a first slot body 1801 and a second slot body 1802 disposed on the side of the transverse member 18, wherein the first slot body 1801 is perpendicular to the second slot body 1802;

[0073] A guide member 19 is rotatably mounted on one end of the first slot body 1801 away from the second slot body 1802 , and a torsion spring is disposed on the rotating shaft of the guide member 19 .

[0074] In the initial state, the abutment wheel 21 is on the first horizontal plane 1804, at which time the end of the ejector pin 3 is flush with the end of the needle sleeve 2 and the second cylindrical spring is in a stretched state. When the mold body 1 is separated from the static mold, the double-headed cylinder 17 will be activated to push the transverse member 18 to move along the length direction of the guide member 20. At this time, the abutment wheel 21 will move from the first horizontal plane 1804 to the second inclined surface 1805, so that the connecting plate 16 moves away from the needle sleeve 2 and drives the ejector pin 3 to move. 3 is retracted into the interior of the needle sleeve 2, and with the movement of the transverse member 18, the abutting wheel 21 will move to the second horizontal plane 1806, and when the abutting wheel 21 is aligned with the first groove 1801, the second cylindrical spring will release the elastic potential energy, so that the connecting plate 16 can accelerate the ejector 3 to move toward the injection molded part, and when colliding with the injection molded part, the injection molded part is ejected so that the injection molded part can be grabbed by the unloading robot, and when the abutting wheel 21 moves into the second groove 1802, the second cylindrical spring is still in a stretched state, and at this time, the ejector 3 is in a state of protruding from the needle sleeve 2, and the unloading action is completed.

[0075] After the unloading action is completed, the double-headed cylinder 17 drives the transverse member 18 to move in the opposite direction. At this time, the abutment wheel 21 will move along the second groove body 1802, and when the abutment wheel 21 abuts against the guide member 19, it can drive the guide member 19 to deflect, and then the abutment wheel 21 will move along the first inclined surface 1803. After the abutment wheel 21 is separated from the guide member 19, under the action of the torsion spring, the end of the guide member 19 away from its rotation center abuts against the lower side wall of the second groove body 1802, and then the double-headed cylinder 17 drives the transverse member 18 away from the double-headed cylinder 17 again, so that the abutment wheel 21 can move along the first inclined surface 1803 under the guidance of the guide member 19, until when the abutment wheel 21 moves to the first horizontal plane 1804, the abutment wheel 21 is reset, and at the same time, the end of the ejector pin 3 is restored to be flush with the end of the needle sleeve 2.

[0076] Through the above arrangement, during the movement of the transverse moving member 18, the ejector pin 3 can be driven to retract into the needle sleeve 2. At the same time, with the cooperation of the abutment wheel 21 and the first groove body 1801, the ejector pin 3 is driven to accelerate and protrude from the needle sleeve 2, thereby realizing the collision between the ejector pin 3 and the injection molded part, so as to eject the injection molded part for grabbing by the unloading robot. The abutment wheel 21 cooperates with the guide member 19 to realize the resetting of the abutment wheel 21, so that when the transverse moving member 18 reciprocates, the action of ejecting the injection molded part can be repeated, so that the unloading can be carried out continuously, thereby ensuring the continuous progress of the injection molding operation.

[0077] See also Figure 2 , Figure 6~Figure 7The pressure relief structure is connected to the intermediate connecting pipe and the connecting plate 16. The pressure relief structure can balance the air pressure in the negative pressure component when the lifting component is in motion. The pressure relief structure includes a pressure relief sleeve 13 connected to the intermediate connecting pipe. The pressure relief sleeve 13 is provided with a pressure relief port 1301. The axial direction of the pressure relief port 1301 is perpendicular to the axial direction of the pressure relief sleeve 13.

[0078] A second sealing plug 14 is sealingly and slidably installed in the pressure relief sleeve 13 , and a connecting rod 15 penetrating the pressure relief sleeve 13 is installed on the second sealing plug 14 . The connecting rod 15 is detachably connected to the connecting plate 16 .

[0079] When the abutment wheel 21 is on the first horizontal plane 1804, the second sealing plug 14 is in a state where the pressure relief sleeve 13 is away from the pressure relief port 1301. At this time, the pressure relief port 1301 is disconnected from the intermediate connecting tube. Therefore, when the first sealing plug 6 is actuated, a negative pressure can be formed in the closed chamber formed by the sealing cylinder body 5, the intermediate connecting tube and the needle sleeve 2, thereby improving the tightness of the connection between the needle sleeve 2 and the injection molded part. When the abutment wheel 21 moves to the second horizontal plane 1806 via the second inclined surface 1805, the connecting plate 16 will drive the second sealing plug 14 to move toward the pressure relief port 1301, and connect the pressure relief sleeve 13 with the outside world to perform a pressure relief action, so that the air pressure in the closed chamber formed by the sealing cylinder body 5, the intermediate connecting tube and the needle sleeve 2 is balanced with the outside world, thereby ensuring that the injection molded part can be ejected when the ejector pin 3 hits the injection molded part.

[0080] Through the above arrangement, the closed chamber formed by the sealing cylinder body 5, the middle connecting tube and the needle sleeve 2 is depressurized before the ejector pin 3 hits the injection molded part, thereby preventing the injection molded part from being in an adsorbed state when the ejector pin 3 hits the injection molded part, thereby improving the success rate of unloading.

[0081] As an embodiment of the present invention, a medical injection molding system is also proposed, including the mold for coordinated unloading of negative pressure and top push.

[0082] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0083] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A mold for unloading by coordinating negative pressure and top pushing, comprising a dynamic mold and a static mold; It is characterized in that The movable mold comprises: A mold body (1), wherein a plurality of sets of needle sleeves (2) are arranged on the mold body (1), the interior of the needle sleeves (2) is a hollow structure, and a plurality of adsorption holes (201) are arranged on the needle sleeves (2) at equal intervals in a circumference; An ejector pin (3) is slidably disposed through the needle sleeve (2); a negative pressure component connected to the needle sleeve (2), the negative pressure component being capable of generating negative pressure in the needle sleeve (2) and adsorbing the injection molded part when the mold body (1) is separated from the static mold; a lifting assembly, arranged in the mold body (1) and connected to the ejector pin (3), the lifting assembly being capable of pulling and releasing the ejector pin (3), and when the lifting assembly releases the ejector pin (3), the ejector pin (3) is capable of protruding from the end of the needle sleeve (2); A pressure relief structure, connected to the negative pressure component and the lifting component, wherein the pressure relief structure can balance the air pressure in the negative pressure component when the lifting component is in motion; The pressure relief structure comprises a pressure relief sleeve (13) connected to the negative pressure assembly, the pressure relief sleeve (13) is provided with a pressure relief port (1301), and the axial direction of the pressure relief port (1301) is perpendicular to the axial direction of the pressure relief sleeve (13); A second sealing plug (14) is sealingly and slidably mounted inside the pressure relief sleeve (13), and a connecting rod (15) penetrating the pressure relief sleeve (13) is mounted on the second sealing plug (14), and the connecting rod (15) is detachably connected to the lifting assembly.

2. A negative pressure and top push cooperative unloading mold according to claim 1, characterized in that: The negative pressure assembly comprises a sealing cylinder (5) fixedly mounted in the mold body (1), one end of the sealing cylinder (5) being connected to an intermediate connecting pipe parallel to the sealing cylinder (5), the intermediate connecting pipe being connected to the needle sleeve (2) through a plurality of connecting pipes (4), and the intermediate connecting pipe being connected to the pressure relief sleeve (13); An elastic pumping structure is also provided in the sealed cylinder body (5), and when the elastic pumping structure is actuated, the air pressure in the sealed cylinder body (5) can be changed; The negative pressure assembly further comprises an abutment kit connected to the elastic pumping structure, wherein the abutment kit is used to drive the elastic pumping structure to move.

3. A negative pressure and top push cooperative unloading mold according to claim 2, characterized in that: The elastic pumping structure comprises a first sealing plug (6) sealingly and slidably mounted in the sealing cylinder (5); the first sealing plug (6) is connected to a telescopic shaft (7) coaxial therewith; an end of the telescopic shaft (7) away from the first sealing plug (6) passes through the sealing cylinder (5); The telescopic shaft (7) is also sleeved with a first cylindrical spring (8), one end of the first cylindrical spring (8) is connected to the inner wall of the sealing cylinder (5), and the other end is connected to the first sealing plug (6); A connecting plate (9) is also provided at one end of the telescopic shaft (7) away from the first sealing plug (6), and the connecting plate (9) is connected to the abutment sleeve.

4. The mold for unloading by negative pressure and top push according to claim 3 is characterized in that: The abutment kit comprises a connecting shaft (10) rotatably connected to an end of the connecting plate (9) away from the telescopic shaft (7), the connecting shaft (10) passing through the mold body (1) and being able to slide along the length direction of the mold body (1); The abutment kit further comprises a guide sleeve (12) detachably mounted on the side of the mold body (1), a trigger plate (11) being slidably mounted in the guide sleeve (12), an abutment portion (1102) being provided at one end of the trigger plate (11), and an inclined groove (1101) being provided on the trigger plate (11); The connecting shaft (10) is capable of rolling in the inclined groove body (1101).

5. The mold for unloading by negative pressure and top pushing according to claim 2 is characterized in that: The lifting component comprises: A connecting plate (16) connected to the connecting rod (15), arranged in the mold body (1) and connected to the ejector pin (3), the connecting plate (16) being connected to the mold body (1) via an elastic telescopic rod (22); an abutment wheel (21) rotatably connected to the connecting plate (16); A drive assembly is installed in the mold body (1), and the drive assembly cooperates with the abutment wheel (21) to enable the connecting plate (16) to move away from the needle sleeve (2), and when the connecting plate (16) moves to a predetermined position, the connecting plate (16) moves in the reverse direction and drives the ejector pin (3) to protrude from the end of the needle sleeve (2).

6. The mold for unloading by negative pressure and top pushing according to claim 5, characterized in that: The elastic telescopic rod (22) comprises a connecting sleeve connected to the mold body (1) and a telescopic rod connected to the connecting plate (16), the telescopic rod and the connecting sleeve being slidably fitted together; A second cylindrical spring is arranged in the connecting sleeve, one end of the second cylindrical spring is connected to the inner wall of the connecting sleeve, and the other end is connected to the telescopic rod.

7. The mold for unloading by negative pressure and top pushing according to claim 5 is characterized in that: The driving assembly comprises a double-headed cylinder (17) fixedly mounted on the mold body (1), and a traverse member (18) is mounted on two action ends of the double-headed cylinder (17), and the traverse member (18) is slidably connected to a guide member (20) disposed in the mold body (1); One end of the transverse moving member (18) facing the abutment wheel (21) is provided with a first inclined surface (1803), a first horizontal surface (1804), a second inclined surface (1805) and a second horizontal surface (1806) in sequence, and when the abutment wheel (21) is on the first horizontal surface (1804), the connecting plate (16) can make the end of the ejector pin (3) flush with the end of the needle sleeve (2); The drive assembly further comprises a switching kit arranged on the side of the transverse member (18).

8. The negative pressure and top-pushing cooperative unloading mold according to claim 7 is characterized in that: The switching kit comprises a first slot body (1801) and a second slot body (1802) arranged on the side of the transverse member (18), wherein the first slot body (1801) is perpendicular to the second slot body (1802); A guide member (19) is rotatably mounted on one end of the first trough body (1801) away from the second trough body (1802), and a torsion spring is arranged on the rotating shaft of the guide member (19).

9. A medical injection molding system, characterized in that: A mold for unloading by coordinated negative pressure and top pushing as described in any one of claims 1 to 8.

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